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Definition and Variation of the Saturation Current of Monolithic Inductors

The saturation current of a monolithic inductor is defined as the current at which the inductance L decreases by 30% from its initial value. This current corresponds to the DC bias applied to the inductor. The relationship between the saturation current and the Hs (magnetic field strength) of a monolithic inductor is such that, in the initial portion of the powder‑material magnetization curve, the permeability μ remains relatively constant, and the inductance L varies only slightly with changes in the applied magnetic field. In the latter portion of the curve, however, μ increases significantly, and L becomes highly sensitive to variations in the applied field. For a given powder‑material system, the saturation flux density Bs is essentially constant; since Bs ≈ μ·Hs, it follows that Hs must also remain constant. Consequently, the larger the Hs, the smaller the slope of the hysteresis loop—indicating a more gradual change in μ—and the higher the saturation level.

10

07

2024

Setting out once again toward a better life, Tongyou Group officially commences operations with great success!

Tongyou Group has a auspicious start—let’s all work together to forge an even brighter future! Tongyou Intelligent Equipment and Huacui’s integrated molded inductors are striving for even higher quality!

29

01

2024

Zhai Gang, Director of the Sichuan Provincial Department of Economy and Information Technology, led a delegation to Tongyou Microelectronics (Sichuan) Co., Ltd. for research and guidance.

On the morning of December 13, a delegation including Zhai Gang, Director of the Sichuan Provincial Department of Economy and Information Technology; Zhou Haiqi, Secretary of the Party Committee of the Department; He Ping, Secretary of the CPC Bazhong Municipal Committee; and Li Yufu, Secretary of the Tongjiang County CPC Committee, paid a visit to Tongyou Microelectronics (Sichuan) to conduct research and provide guidance. Zhou Sheng, Chairman of Tongyou Group and General Manager of Tongyou Microelectronics, warmly welcomed the distinguished guests.

13

12

2023

Tongyou Group’s integrated‑mold inductor manufacturing equipment and its full product lineup wowed visitors at the Shenzhen High‑Tech Fair, drawing an exceptionally enthusiastic crowd.

At the recently held China Hi-Tech Fair in Shenzhen, which opened on November 15, Tongyou Group wowed the audience with its state-of-the-art integrated‑molding inductor manufacturing equipment and a comprehensive product lineup, earning widespread acclaim from both visitors and industry professionals. On November 18, the event’s momentum reached an even higher peak, as Tongyou Group’s offerings received an unprecedentedly enthusiastic reception.

18

11

2023

Why are there two ratings for the rated current of power inductors?

The rated current of power inductors is determined by two methods: the “rated current based on self‑heating, Irms,” and the “rated current based on the rate of change of inductance, Isat,” each of which carries significant importance. The “rated current based on self‑heating, Irms,” specifies the maximum allowable current according to the component’s heat generation; exceeding this limit may result in component damage or system failure.

14

08

2023

Wang Yi, Director of the Sichuan Provincial Employment Service Administration, paid a visit to Tongyou Microelectronics to conduct an inspection and provide guidance.

On July 26, Wang Yi, Director of the Sichuan Provincial Employment Service Administration, along with his delegation, paid a visit to Tongyou Group’s 2.5-billion-yuan inductor production base for inspection and guidance, accompanied by city leaders including Zhao Jianren, Vice Mayor of Bazhong; Shi Yongquan, Deputy Secretary-General of the Bazhong Municipal Government; and Zhang Yuming, Party Secretary and Director of the Bazhong Municipal Bureau of Human Resources and Social Security.

28

07

2023

Tongyou was invited to attend the Kunshan Municipal Tax Service Bureau’s special event on leveraging tax policies to support the development of “specialized, refined, distinctive, and innovative” enterprises.

To further support the real economy, the Municipal Tax Service Bureau and the Bureau of Industry and Information Technology have delivered policies and services to specialized, refined, distinctive, and innovative enterprises, hosting two briefings titled “Safeguarding Specialized, Refined, Distinctive, and Innovative Enterprises: Tax Benefits Empowering Technological Innovation” and “An Overview of the Context and Policy Framework for Developing ‘Specialized, Refined, Distinctive, and Innovative’ Enterprises.”

15

04

2023

Tongyou Group’s 5th Anniversary Celebration and 2023 Spring Festival Gala

Growing Grateful for You, Walking Together into the Future 5th Anniversary Celebration & 2023 Spring Gala Thank you for taking the time to read this invitation amidst your busy schedule! Throughout Tongyou’s journey of growth, we have been fortunate to receive your care and support. On this occasion, we extend our sincerest gratitude and best wishes, and hope that, as we move forward, we can continue to advance hand in hand.

09

03

2023

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2024-07-10

Definition and Variation of the Saturation Current of Monolithic Inductors

The saturation current of a monolithic inductor is defined as the current at which the inductance L decreases by 30% from its initial value. This current corresponds to the DC bias applied to the inductor. The relationship between the saturation current and the Hs (magnetic field strength) of a monolithic inductor is such that, in the initial portion of the powder‑material magnetization curve, the permeability μ remains relatively constant, and the inductance L varies only slightly with changes in the applied magnetic field. In the latter portion of the curve, however, μ increases significantly, and L becomes highly sensitive to variations in the applied field. For a given powder‑material system, the saturation flux density Bs is essentially constant; since Bs ≈ μ·Hs, it follows that Hs must also remain constant. Consequently, the larger the Hs, the smaller the slope of the hysteresis loop—indicating a more gradual change in μ—and the higher the saturation level.

Learn more >>

2024-01-29

Setting out once again toward a better life, Tongyou Group officially commences operations with great success!

Tongyou Group has a auspicious start—let’s all work together to forge an even brighter future! Tongyou Intelligent Equipment and Huacui’s integrated molded inductors are striving for even higher quality!

Learn more >>

Zhai Gang, Director of the Sichuan Provincial Department of Economy and Information Technology, led a delegation to Tongyou Microelectronics (Sichuan) Co., Ltd. for research and guidance.

2023-12-13

Zhai Gang, Director of the Sichuan Provincial Department of Economy and Information Technology, led a delegation to Tongyou Microelectronics (Sichuan) Co., Ltd. for research and guidance.

On the morning of December 13, a delegation including Zhai Gang, Director of the Sichuan Provincial Department of Economy and Information Technology; Zhou Haiqi, Secretary of the Party Committee of the Department; He Ping, Secretary of the CPC Bazhong Municipal Committee; and Li Yufu, Secretary of the Tongjiang County CPC Committee, paid a visit to Tongyou Microelectronics (Sichuan) to conduct research and provide guidance. Zhou Sheng, Chairman of Tongyou Group and General Manager of Tongyou Microelectronics, warmly welcomed the distinguished guests.

Learn more >>

Tongyou Group’s integrated‑mold inductor manufacturing equipment and its full product lineup wowed visitors at the Shenzhen High‑Tech Fair, drawing an exceptionally enthusiastic crowd.

2023-11-18

Tongyou Group’s integrated‑mold inductor manufacturing equipment and its full product lineup wowed visitors at the Shenzhen High‑Tech Fair, drawing an exceptionally enthusiastic crowd.

At the recently held China Hi-Tech Fair in Shenzhen, which opened on November 15, Tongyou Group wowed the audience with its state-of-the-art integrated‑molding inductor manufacturing equipment and a comprehensive product lineup, earning widespread acclaim from both visitors and industry professionals. On November 18, the event’s momentum reached an even higher peak, as Tongyou Group’s offerings received an unprecedentedly enthusiastic reception.

Learn more >>

Why are there two ratings for the rated current of power inductors?

2023-08-14

Why are there two ratings for the rated current of power inductors?

The rated current of power inductors is determined by two methods: the “rated current based on self‑heating, Irms,” and the “rated current based on the rate of change of inductance, Isat,” each of which carries significant importance. The “rated current based on self‑heating, Irms,” specifies the maximum allowable current according to the component’s heat generation; exceeding this limit may result in component damage or system failure.

Learn more >>

Wang Yi, Director of the Sichuan Provincial Employment Service Administration, paid a visit to Tongyou Microelectronics to conduct an inspection and provide guidance.

2023-07-28

Wang Yi, Director of the Sichuan Provincial Employment Service Administration, paid a visit to Tongyou Microelectronics to conduct an inspection and provide guidance.

On July 26, Wang Yi, Director of the Sichuan Provincial Employment Service Administration, along with his delegation, paid a visit to Tongyou Group’s 2.5-billion-yuan inductor production base for inspection and guidance, accompanied by city leaders including Zhao Jianren, Vice Mayor of Bazhong; Shi Yongquan, Deputy Secretary-General of the Bazhong Municipal Government; and Zhang Yuming, Party Secretary and Director of the Bazhong Municipal Bureau of Human Resources and Social Security.

Learn more >>

Tongyou was invited to attend the Kunshan Municipal Tax Service Bureau’s special event on leveraging tax policies to support the development of “specialized, refined, distinctive, and innovative” enterprises.

2023-04-15

Tongyou was invited to attend the Kunshan Municipal Tax Service Bureau’s special event on leveraging tax policies to support the development of “specialized, refined, distinctive, and innovative” enterprises.

To further support the real economy, the Municipal Tax Service Bureau and the Bureau of Industry and Information Technology have delivered policies and services to specialized, refined, distinctive, and innovative enterprises, hosting two briefings titled “Safeguarding Specialized, Refined, Distinctive, and Innovative Enterprises: Tax Benefits Empowering Technological Innovation” and “An Overview of the Context and Policy Framework for Developing ‘Specialized, Refined, Distinctive, and Innovative’ Enterprises.”

Learn more >>

Tongyou Group’s 5th Anniversary Celebration and 2023 Spring Festival Gala

2023-03-09

Tongyou Group’s 5th Anniversary Celebration and 2023 Spring Festival Gala

Growing Grateful for You, Walking Together into the Future 5th Anniversary Celebration & 2023 Spring Gala Thank you for taking the time to read this invitation amidst your busy schedule! Throughout Tongyou’s journey of growth, we have been fortunate to receive your care and support. On this occasion, we extend our sincerest gratitude and best wishes, and hope that, as we move forward, we can continue to advance hand in hand.

Learn more >>

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